[STIM] Improve error messages

[João Boechat (joao-boechat)]

This PR improves Stim compiler validation and diagnostics, passing the correct spans for argument related errors and adding repeated qubit errors.

Changes

• Rejects repeated qubits within pair and triple target groups, highlighting the duplicate target instead of the full instruction.
• Uses argument-level spans for invalid angles and probabilities, unsupported arguments, and incorrect argument counts; excess-argument errors now highlight only the unexpected values.
• Validates individual probabilities and their total before constructing noise tables, producing instruction-specific errors and removing redundant internal validation paths.